Wenkai ZHU, Shan ZHONG, Johan STEELANT

DOI Number: N/A

Conference number: HiSST-2025-343

This present investigation focuses on the development and application of herringbone riblets to delay boundary layer laminar-turbulent transition in hypersonic flow. A series of wind tunnel experiments were conducted on a 270 mm long flared cone model at Mach 5 in the High-Supersonic Tunnel (HSST) at University of Manchester. Herringbone riblets, produced via laser manufacturing techniques, were evaluated for their influence on boundary layer transition, using high-speed schlieren imaging. The effects of riblet height and placement along the model were systematically examined. It was found that riblets with a height of 54 µm placed at 170 mm from the leading edge of the model delayed the onset of transition at a unit Reynolds number of Reunit = 10 ×106 m−1, demonstrating their potential as a means of effective flow control in hypersonic flow.

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In Categories: 1.Events, 1.HiSST 2025, Hypersonic Fundamentals & History
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